43. They aren ,t answering the phone . They …………. a. shouldn ,t left b. must have left c. need have left 44. We shouldn ,t eat much fat. It is………… a. inhealthy b. unhealthy c. disheathy 45. I used to …………. stamps but I don , t do it now. a. collecting b. collect c. collected 46. Macy , s is one of the biggest …………in the city. a. department store b. departments store c. department stores 47. I……. . longer go swimming . a. no b. not c. any 48. The potatoes should be washed carefully before ………cooked. a. be b. are c. being 49. His father is going to ………. a car . a. buying b. buys c. buy 50. She is tall …………to reach the ceiling a. enough b. too c. so 51 . A person who cannot speak and hear is called a …………… a. character b. deaf- mute c. deaf 52. This boy enjoys…………soccer after school a. playing b. play c. played 53. Can I take part ……. . this activity ? a. in b. on c. at 54. I was born …………May 25 th 2003 a. at b. on c. in 55. They often march …………May Day a. at b. on c. in 56. It often rains………. . winter. a. at b. in c. on